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Old 31-May-2008, 06:53 PM
peteshimmon peteshimmon is offline
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Default Wolf traps and all that!

Some 40 plus years ago I was reading a slim
volume about Mars. In one of the last
chapters was a photograph of something called
a Wolf trap. It was a small cicular plate
containing things to look for microbes, it
shot out a metal weight with sticky string
which was pulled back to allow tests on the
collected soil. Being a gadget fan I was
quite fascinated.

Years passed and the two Viking landers
delivered complex apparatus to the Martian
surface. So now we would know about microbes
or not! Or not! Or not! After millions of
dollars investment it seemed something
inorganic could fool two of the three
microbe detectors!

I dug out my Cosmos book to remind me of the
story. Sagan explained how Wolf Vishniac had
his "Trap" dropped from the Viking program.
Pity, it had a simple objective of seeing if
nutrients in clear water would feed any
micobes turning the water cloudy. But I
suppose this might have been fooled as well.

Actually at the time, my conspiracy neurons
started firing, are scientists afraid of
complete confirmations when they would like
continuing grants far into the future?
No..silly thoughts..smacked wrist!

I have thought that a camera attached to a
microscope is the best idea these days, lets
just look for the darned things.

Anyway, whats the betting when Phoenix has
done its things we get a lot of "maybees"
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Old 31-May-2008, 08:45 PM
novaderrik novaderrik is offline
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Default

there's always a lot of "maybes" with this kind of thing.
and, along with those "maybes", come the "they are covering something ups" and the "it's all about power and moneys".
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Old 31-May-2008, 09:21 PM
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01101001 01101001 is offline
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Default

Quote:
Originally Posted by peteshimmon View Post
I have thought that a camera attached to a
microscope is the best idea these days, lets
just look for the darned things.
Look away -- soon.

University of Arizona, Mars Phoenix MECA

Quote:
The optical and atomic-force microscopes complement MECA's wet chemisty experiments. With images from these microscopes, scientists will examine the fine detail structure of soil and water ice samples. Detection of hydrous and clay minerals by these microscopes may indicate past liquid water in the martian arctic. The optical microscope will have a resolution of 4 microns per pixel, allowing detection of particles ranging from about 10 micrometers up to the size of the field of view (about 1 millimeter by 2 millimeters).
[...]
The atomic force microscope will provide sample images down to 10 nanometers - the smallest scale ever examined on Mars. Using its sensors, the AFM creates a very small-scale "topographic" map showing the detailed structure of soil and ice grains.
From what I've read, Earth bacteria range from about 0.1 to about 600 µm.
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